Gravity is a force that the earth makes to attract everything to its center. However, once we distance ourselves from it, it is weakened by the distance between the center of gravity and the body in question. In fact, the assessment that there is gravity or not in space is totally wrong, because that force is what keeps the operation of the planetary orbits, the strength of the sun because of the size it presents makes all the planets keep within your orbit.

Gravity decrease

Gravity decreases with distance, to understand that we have to apply the equation of attraction of gravity between objects, which determines that the greater the mass of the bodies involved, the greater the attraction.

If it did not exist, the gravity and the attraction of the bodies, there would most likely be a total imbalance in space, the planets were without orbit and would turn without any location.

Space stations and gravity

The space stations are located at a distance of 300-500 km from the earth, in this space is 90% of the gravity that exists within the planet making us feel somehow lighter. It has been determined that astronauts feel weightless because the ship in which they are must move at a constant speed to continue orbiting the earth in a controlled manner.

¿Zero gravity, does it really exist?

The force in gravity, even if it is weak, is always present, but it does not reach zero. In fact, the gravitational power that can exist between galaxies often causes them to orbit between them.

¿ Is there gravity in space?

The answer is that yes, gravity can decrease or increase, but never really disappear, because without it. The planets would have no direction, there would be no orbit and an established order in the universe.

LA VIDA EN AUSENCIA DE GRAVEDAD. GRAVEDAD CERO (EAE)

Source:
http://gravedad.net/por-que-no-hay-gravedad-en-el-espacio